Brawn

To Brawn, Earth is essentially a hostile environment - and he loves it. Strong, rugged, agile - the most macho of all Autobots. Delights in challenges. Sorry for those not as tough as himself. Second strongest Autobot - can lift 190,000 pounds and knock down a small building with one punch. High resistance to artillery fire. Vulnerable to attack by electromagnetic waves.

(Source: Wikipedia)